PHP array count by 1

Question

我有一个数组，每年被返回，包含所有月份和月份博客条目。我试图返回整年的博客总数。但是，这个数字每次都是一次性的。应该有一个总的6，但返回5

阵列

array (size=2) 
    '04' => 
    array (size=1) 
     0 => 
     array (size=7) 
      'entry_id' => string '5' (length=1) 
      'title' => string 'Post Title' (length=36) 
      'year' => string '2015' (length=4) 
      'month' => string '04' (length=2) 
      'day' => string '30' (length=2) 
      'date' => string 'Apr. 30, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=86) 
    '05' => 
    array (size=5) 
     0 => 
     array (size=7) 
      'entry_id' => string '4' (length=1) 
      'title' => string 'Post Title' (length=56) 
      'year' => string '2015' (length=4) 
      'month' => string '05' (length=2) 
      'day' => string '14' (length=2) 
      'date' => string 'May. 14, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=96) 
     1 => 
     array (size=7) 
      'entry_id' => string '7' (length=1) 
      'title' => string 'Post Title' (length=58) 
      'year' => string '2015' (length=4) 
      'month' => string '05' (length=2) 
      'day' => string '15' (length=2) 
      'date' => string 'May. 15, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=105) 
     2 => 
     array (size=7) 
      'entry_id' => string '8' (length=1) 
      'title' => string 'Post Title' (length=45) 
      'year' => string '2015' (length=4) 
      'month' => string '05' (length=2) 
      'day' => string '15' (length=2) 
      'date' => string 'May. 15, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=95) 
     3 => 
     array (size=7) 
      'entry_id' => string '9' (length=1) 
      'title' => string 'Post Title' (length=52) 
      'year' => string '2015' (length=4) 
      'month' => string '05' (length=2) 
      'day' => string '15' (length=2) 
      'date' => string 'May. 15, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=98) 
     4 => 
     array (size=7) 
      'entry_id' => string '10' (length=2) 
      'title' => string 'Post Title' (length=33) 
      'year' => string '2015' (length=4) 
      'month' => string '05' (length=2) 
      'day' => string '15' (length=2) 
      'date' => string 'May. 15, 2015' (length=13) 
      'link' => string 'www.brand.com/blog/title' (length=83) 

环

$year_count = 0; 

    foreach($year_data as $year_posts) { 

     $year_count += count($year_posts); 
    } 

    echo $year_count; 

的$ print_r的year_posts

 Array 
    (
     [0] => Array 
      (
       [entry_id] => 6 
       [title] => Blog Title 
       [year] => 2014 
       [month] => 05 
       [day] => 14 
       [date] => May. 14, 2014 
       [link] => blog link 
      ) 

    ) 


    Array 
    (
     [0] => Array 
      (
       [entry_id] => 5 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 04 
       [day] => 30 
       [date] => Apr. 30, 2015 
       [link] => blog-url 
      ) 

    ) 


    Array 
    (
     [0] => Array 
      (
       [entry_id] => 4 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 05 
       [day] => 14 
       [date] => May. 14, 2015 
       [link] => blog-url 
      ) 

     [1] => Array 
      (
       [entry_id] => 7 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 05 
       [day] => 15 
       [date] => May. 15, 2015 
       [link] => blog-url 
      ) 

     [2] => Array 
      (
       [entry_id] => 8 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 05 
       [day] => 15 
       [date] => May. 15, 2015 
       [link] => blog-url 
      ) 

     [3] => Array 
      (
       [entry_id] => 9 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 05 
       [day] => 15 
       [date] => May. 15, 2015 
       [link] => blog-url 
      ) 

     [4] => Array 
      (
       [entry_id] => 10 
       [title] => Blog Title 
       [year] => 2015 
       [month] => 05 
       [day] => 15 
       [date] => May. 15, 2015 
       [link] => blog-url 
      ) 

    ) 

Answer 1

PHP有一些健壮的array functions值得熟悉。对于这种单线循环通常有一个更简单的选择。

$post_count = array_sum(array_map('count', $year_data));